21) -5z – 4 + 8 - x; use x = 7, and z = 2
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squash = cordial + water
400 ml = 50 ml + x ml
350 ml = x ml
Therefore, 350 ml are water.
350 ml / 400 ml = 0.875 =
So the answer is 7 / 8
squash = cordial + water
400 ml = 50 ml + x ml
350 ml = x ml
Therefore, 350 ml are water.
350 ml / 400 ml = 0.875 =
So the answer is 7 / 8